content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2014, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ---------------
   * RangeTests.java
   * ---------------
   * (C) Copyright 2003-2014, by Object Refinery Limited and Contributors.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   Sergei Ivanov;
   *
   * Changes
   * -------
   * 14-Aug-2003 : Version 1 (DG);
   * 18-Dec-2007 : Additional tests from Sergei Ivanov (DG);
   * 08-Jan-2012 : Added test for combine() method (DG);
   * 23-Feb-2014 : Added isNaNRange() test (DG);
   *
   */
  
  package org.jfree.data;
  
  import org.jfree.chart.TestUtilities;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNull;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  /**
   * Tests for the {@link Range} class.
   */
  public class RangeTest  {
  
      /**
       * Confirm that the constructor initializes all the required fields.
       */
      @Test
      public void testConstructor() {
          Range r1 = new Range(0.1, 1000.0);
          assertEquals(r1.getLowerBound(), 0.1, 0.0d);
          assertEquals(r1.getUpperBound(), 1000.0, 0.0d);
  
          try {
              /*Range r2 =*/ new Range(10.0, 0.0);
              fail("Lower bound cannot be greater than the upper");
          }
          catch (Exception e) {
              // expected
          }
      }
  
      /**
       * Confirm that the equals method can distinguish all the required fields.
       */
      @Test
      public void testEquals() {
          Range r1 = new Range(0.0, 1.0);
          Range r2 = new Range(0.0, 1.0);
          assertEquals(r1, r2);
          assertEquals(r2, r1);
  
          r1 = new Range(0.0, 1.0);
          r2 = new Range(0.5, 1.0);
          assertFalse(r1.equals(r2));
  
          r1 = new Range(0.0, 1.0);
          r2 = new Range(0.0, 2.0);
          assertFalse(r1.equals(r2));
  
          // a Range object cannot be equal to a different object type
          assertFalse(r1.equals(new Double(0.0)));
      }
  
      /**
       * Two objects that are equal are required to return the same hashCode.
       */
      @Test
      public void testHashCode() {
          Range a1 = new Range(1.0, 100.0);
          Range a2 = new Range(1.0, 100.0);
          assertEquals(a1.hashCode(), a2.hashCode());
  
          a1 = new Range(-100.0, 2.0);
          a2 = new Range(-100.0, 2.0);
          assertEquals(a1.hashCode(), a2.hashCode());
      }
  
      /**
       * Simple tests for the contains() method.
       */
      @Test
      public void testContains() {
          Range r1 = new Range(0.0, 1.0);
          assertFalse(r1.contains(Double.NaN));
          assertFalse(r1.contains(Double.NEGATIVE_INFINITY));
          assertFalse(r1.contains(-1.0));
          assertTrue(r1.contains(0.0));
          assertTrue(r1.contains(0.5));
          assertTrue(r1.contains(1.0));
          assertFalse(r1.contains(2.0));
          assertFalse(r1.contains(Double.POSITIVE_INFINITY));
      }
  
      /**
       * Tests the constrain() method for various values.
       */
      @Test
      public void testConstrain() {
          Range r1 = new Range(0.0, 1.0);
  
          double d = r1.constrain(0.5);
          assertEquals(0.5, d, 0.0000001);
  
          d = r1.constrain(0.0);
          assertEquals(0.0, d, 0.0000001);
  
          d = r1.constrain(1.0);
          assertEquals(1.0, d, 0.0000001);
  
          d = r1.constrain(-1.0);
          assertEquals(0.0, d, 0.0000001);
  
          d = r1.constrain(2.0);
          assertEquals(1.0, d, 0.0000001);
  
          d = r1.constrain(Double.POSITIVE_INFINITY);
          assertEquals(1.0, d, 0.0000001);
  
          d = r1.constrain(Double.NEGATIVE_INFINITY);
          assertEquals(0.0, d, 0.0000001);
  
          d = r1.constrain(Double.NaN);
          assertTrue(Double.isNaN(d));
      }
  
      /**
       * Simple tests for the intersects() method.
       */
      @Test
      public void testIntersects() {
          Range r1 = new Range(0.0, 1.0);
          assertFalse(r1.intersects(-2.0, -1.0));
          assertFalse(r1.intersects(-2.0, 0.0));
          assertTrue(r1.intersects(-2.0, 0.5));
          assertTrue(r1.intersects(-2.0, 1.0));
          assertTrue(r1.intersects(-2.0, 1.5));
          assertTrue(r1.intersects(0.0, 0.5));
          assertTrue(r1.intersects(0.0, 1.0));
          assertTrue(r1.intersects(0.0, 1.5));
          assertTrue(r1.intersects(0.5, 0.6));
          assertTrue(r1.intersects(0.5, 1.0));
          assertTrue(r1.intersects(0.5, 1.5));
          assertFalse(r1.intersects(1.0, 1.1));
          assertFalse(r1.intersects(1.5, 2.0));
      }
  
      /**
       * A simple test for the expand() method.
       */
      @Test
      public void testExpand() {
          Range r1 = new Range(0.0, 100.0);
          Range r2 = Range.expand(r1, 0.10, 0.10);
          assertEquals(-10.0, r2.getLowerBound(), 0.001);
          assertEquals(110.0, r2.getUpperBound(), 0.001);
  
          // Expand by 0% does not change the range
          r2 = Range.expand(r1, 0.0, 0.0);
          assertEquals(r1, r2);
  
          try {
              Range.expand(null, 0.1, 0.1);
              fail("Null value is accepted");
          }
          catch (Exception e) {
          }
  
          // Lower > upper: mid point is used
          r2 = Range.expand(r1, -0.8, -0.5);
          assertEquals(65.0, r2.getLowerBound(), 0.001);
          assertEquals(65.0, r2.getUpperBound(), 0.001);
      }
  
      /**
       * A simple test for the scale() method.
       */
      @Test
      public void testShift() {
          Range r1 = new Range(10.0, 20.0);
          Range r2 = Range.shift(r1, 20.0);
          assertEquals(30.0, r2.getLowerBound(), 0.001);
          assertEquals(40.0, r2.getUpperBound(), 0.001);
  
          r1 = new Range(0.0, 100.0);
          r2 = Range.shift(r1, -50.0, true);
          assertEquals(-50.0, r2.getLowerBound(), 0.001);
          assertEquals(50.0, r2.getUpperBound(), 0.001);
  
          r1 = new Range(-10.0, 20.0);
          r2 = Range.shift(r1, 20.0, true);
          assertEquals(10.0, r2.getLowerBound(), 0.001);
          assertEquals(40.0, r2.getUpperBound(), 0.001);
  
          r1 = new Range(-10.0, 20.0);
          r2 = Range.shift(r1, -30.0, true);
          assertEquals(-40.0, r2.getLowerBound(), 0.001);
          assertEquals(-10.0, r2.getUpperBound(), 0.001);
  
          r1 = new Range(-10.0, 20.0);
          r2 = Range.shift(r1, 20.0, false);
          assertEquals(0.0, r2.getLowerBound(), 0.001);
          assertEquals(40.0, r2.getUpperBound(), 0.001);
  
          r1 = new Range(-10.0, 20.0);
          r2 = Range.shift(r1, -30.0, false);
          assertEquals(-40.0, r2.getLowerBound(), 0.001);
          assertEquals(0.0, r2.getUpperBound(), 0.001);
  
          // Shifting with a delta of 0 does not change the range
          r2 = Range.shift(r1, 0.0);
          assertEquals(r1, r2);
  
          try {
              Range.shift(null, 0.1);
              fail("Null value is accepted");
          }
          catch (Exception e) {
          }
      }
  
      /**
       * A simple test for the scale() method.
       */
      @Test
      public void testScale() {
          Range r1 = new Range(0.0, 100.0);
          Range r2 = Range.scale(r1, 0.10);
          assertEquals(0.0, r2.getLowerBound(), 0.001);
          assertEquals(10.0, r2.getUpperBound(), 0.001);
  
          r1 = new Range(-10.0, 100.0);
          r2 = Range.scale(r1, 2.0);
          assertEquals(-20.0, r2.getLowerBound(), 0.001);
          assertEquals(200.0, r2.getUpperBound(), 0.001);
  
          // Scaling with a factor of 1 does not change the range
          r2 = Range.scale(r1, 1.0);
          assertEquals(r1, r2);
  
          try {
              Range.scale(null, 0.1);
              fail("Null value is accepted");
          }
          catch (Exception e) {
          }
  
          try {
              Range.scale(r1, -0.5);
              fail("Negative factor accepted");
          }
          catch (Exception e) {
          }
      }
  
      /**
       * Serialize an instance, restore it, and check for equality.
       */
      @Test
      public void testSerialization() {
          Range r1 = new Range(25.0, 133.42);
          Range r2 = (Range) TestUtilities.serialised(r1);
          assertEquals(r1, r2);
      }
  
      private static final double EPSILON = 0.0000000001;
  
      /**
       * Some checks for the combine method.
       */
      @Test
      public void testCombine() {
          Range r1 = new Range(1.0, 2.0);
          Range r2 = new Range(1.5, 2.5);
  
          assertNull(Range.combine(null, null));
          assertEquals(r1, Range.combine(r1, null));
          assertEquals(r2, Range.combine(null, r2));
          assertEquals(new Range(1.0, 2.5), Range.combine(r1, r2));
  
          Range r3 = new Range(Double.NaN, 1.3);
          Range rr = Range.combine(r1, r3);
          assertTrue(Double.isNaN(rr.getLowerBound()));
          assertEquals(2.0, rr.getUpperBound(), EPSILON);
  
          Range r4 = new Range(1.7, Double.NaN);
          rr = Range.combine(r4, r1);
          assertEquals(1.0, rr.getLowerBound(), EPSILON);
          assertTrue(Double.isNaN(rr.getUpperBound()));
      }
  
      /**
       * Some checks for the combineIgnoringNaN() method.
       */
      @Test
      public void testCombineIgnoringNaN() {
          Range r1 = new Range(1.0, 2.0);
          Range r2 = new Range(1.5, 2.5);
  
          assertNull(Range.combineIgnoringNaN(null, null));
          assertEquals(r1, Range.combineIgnoringNaN(r1, null));
          assertEquals(r2, Range.combineIgnoringNaN(null, r2));
          assertEquals(new Range(1.0, 2.5), Range.combineIgnoringNaN(r1, r2));
  
          Range r3 = new Range(Double.NaN, 1.3);
          Range rr = Range.combineIgnoringNaN(r1, r3);
          assertEquals(1.0, rr.getLowerBound(), EPSILON);
          assertEquals(2.0, rr.getUpperBound(), EPSILON);
  
          Range r4 = new Range(1.7, Double.NaN);
          rr = Range.combineIgnoringNaN(r4, r1);
          assertEquals(1.0, rr.getLowerBound(), EPSILON);
          assertEquals(2.0, rr.getUpperBound(), EPSILON);
      }
      
      @Test
      public void testIsNaNRange() {
          assertTrue(new Range(Double.NaN, Double.NaN).isNaNRange());
          assertFalse(new Range(1.0, 2.0).isNaNRange());
          assertFalse(new Range(Double.NaN, 2.0).isNaNRange());
          assertFalse(new Range(1.0, Double.NaN).isNaNRange());
      }
  }
  